The ZS6BKW antenna is a better match for our bands than the G5RV. The method of construction and tuning is essentially the same for both antennas but the dimensions are different.

Here is the ZS6BKW antenna installed at AK6R fine tuned for the CW/FT8 frequencies on 40-20-17-12-10 meters. An excellent antenna when installed at 30 feet or higher and no tuner required avoiding the tuner losses and constant retuning. If you want to work all bands from 80-10 install an antenna tuner between the 1:1 balun and the amplifier and ignore the 39/40 switch.

Is this the best FT8 antenna? – I think so as I has made over 70,000 contacts and it still is a proven winner -Good world wide DX, easy to install, no tuner and takes full legal limit.

PAL ZS68006 Ant Layout - G5RV/ZS6BKW Antennas

Here are several different 1:1 baluns you can use depending on power requirements:

Slip On Feed Line Common Mode Line Isolator/Choke - 1/2"/12.7mm coax cable, 1.8-100 MHz, 5,10,15, 20 bead option, Mix 31

Name: Slip On Feed Line Common Mode Line Isolator/Choke - 1/2"/12.7mm coax cable, 1.8-100 MHz, 5,10,15, 20 bead option, Mix 31
Brand: Palomar Engineers
SKU: SLO31-1/2-5
Price: 19.95 USD
Availability: InStock

Store/Antenna Products/Coax Feed Line Common Mode Chokes/Slip On Sleeve Chokes

SKU SLO31-1/2-5

$19.95

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List price ~~$29.95~~

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5 bead version - 3-100 MHz

10 bead version 1.8-100 MHz

15 bead version 1.8-100 MHz

20 bead version 1.8-100 MHz

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Slip On Feed Line Common Mode Line Isolator/Choke - 1/2"/12.7mm coax cable, 1.8-100 MHz, 5,10,15, 20 bead option, Mix 31

Store/Antenna Products/Coax Feed Line Common Mode Chokes/Slip On Sleeve Chokes

Product Details

Brand: Palomar Engineers

MPN: SLO31-1/2-NN, NN=5, 10, 15, 20

Country/Region of Manufacture: USA

Effective Frequency Range (MHz): 3-300 (5 bead), 1.8-300 (10, 15 bead)

PEP Power Rating (watts): same as coax cable rating

Common Mode Attenuation (db): see graph

Estimated Insertion Loss (db): .025

Input Connector Type: none

Output Connector Connector Type: none

Ground Connector (Y/N): none

Enclosure Size (LxWxH inches): none

1/2″/12.7mm max Cable Size Chokes

Model SLO-1/2 family of chokes are for use with ½” coax cable like RG-8, RG-213, 9913, LMR-400 and similar cables up to ½” diameter – works on all cable impedances (50, 62, 75, 90 ohms etc). 80-6 meters.Choose SLO-1/2 (5 beads) or for extended choking, choose SLO-1/2E (10 beads) or for super extended choking choose SLO-1/2SE (15 beads).

Each additional 5 beads is approximately 6 dB of common mode rejection (also 1 “S” unit of noise reduction).

Select chokes with minimum of 500 ohms at your frequency of interest for best results or upgrade to our CUBE(TM), or MC-1-3000 Maxi-Choker(TM) chokes up to 10,000 ohms choking.

Select 5 bead version for 80-2 meters use; 10 bead version for 160-6 meter use, 15 and 20 bead version for even higher choking power on 160-20 meter frequencies. Power rating is same as coax cable used power rating.

Snap On and Slip on Feed line chokes available in sizes to fix cables with outside diameters of 1/4", 3/8", 1/2", 3/4", 1" - check website for other size options.

The 5 bead, 1/2" model was previously part # BA-8

Testimonial:

KI7AY
Wanted to let you know that I was having a problem with RFI on 40m, but immediately after installing your Slip On Coax Feed Line Choke -1/2"/12.7mm cable, 1.8-300 MHz on a new RG-213 jumper between the IC-9100 and tuner, IT WENT COMPLETELY AWAY!

Here is the Coax Noise Filter used to suppress coax common mode currents (works for all type of antennas)

PDF of ZS6BKW at AK6R Construction Article HERE: My ZS6BKW Antenna